Download NetbookBootMaker
http://code.google.com/p/netbook-installer/
Create the installer USB disk from Leopard DVD as mentioned here
http://www.mydellmini.com/forum/mac-os-x-guides/12595-netbookinstaller-1-usb-installation-via-mac.html#post99604
With the USB boot disk, boot and create 2 partitions as mentioned on this "Example 2: GUID Multi-Boot for Windows XP"
http://osx.mechdrew.com/guides/advanced2.shtml
Then proceed with install.
The X120 will be installed with Leopard and working Ethernet. Do a software update, which will update it to 10.5.8, then reboot. Screen will just be blank. Do a safe boot by typing -x on Chamaleon screen. Then run Netbook installer, install all. Leopard will then boot normally. But ethernet will no longer work.
LG X120's WiFi is using Realtek's rtl8187se. This is the same card as MSI Wind, and there is already a driver for MacOS. Install the driver to enable WiFi.
http://financemanila.net/2008/12/download-rtl8187se-driver-and-install-mac-osx-in-your-msi-wind-akoya-advent/
http://www.tierheilpraxis-meder.de/Realtek_RTL8187SE_MacOS10.5_Driver_073_UI_1.6.2.zip
http://rapidshare.com/files/171809218/Realtek_RTL8187SE_MacOS10.5_Driver_073_UI_1.6.2.zip
http://rapidshare.com/files/171826470/Realtek_RTL8187SE_MacOS10.5_Driver.zip
Use this to enable ethernet again
http://sourceforge.net/projects/realtekr1000/
